HIV Flashcards
(203 cards)
When is Acquired Immunodeficiency Syndrome (AIDS) diagnosed?
When CD4 count falls below 200 cells/mm3 or the patient develops an AIDS-defining condition.
How is AIDS infection spread? (hint: 5 ways)
1) blood
2) semen
3) vaginal secretions
4) rectal secretions
5) breast milk
When does the CDC recommend routine HIV screening? Who are considered High Risk?
At leasts once for all patients who are 13-64 years old. If a patient is high risk for infection, testing should be done at least annually.
High risk for infection are:
1) sharing drug-injection equipment (needles, syringes)
2) High-risk sexual behaviors: men who have sex with men, multiple sexual partners, sex with a person known to be infected or a history of sexually transmitted infections (syphilis, chlamydia, gonorrhea)
3) Hx of hepatitis or tuberculosis (TB) infection
How does Acute HIV infection present?
With non-specific flu-like symptoms that can last a few days to several weeks, including fear, myalgias, headache, lymphadenopathy (swollen lymph glands), pharyngitis and rash. Pts can become symptomatic after this initial phase but the virus is still replicating and capable of being transmitted.
When is the viral load high enough for HIV RNA and HIV p24 antigens to be detected with an initial HIV-1/HIV-2 antigen/antibody screening test?
Approximately 2 weeks post-infection the viral load is high enough.
Positive results should be confirmed with an antibody differentiation immunoassay with differentiates HIV-1 (most common subtype in the US) with HIV 2 antibodies. (can be detected in most people about 4 to 12 weeks after contracting disease but can take up to 6 months for some).
What is the In-Home HIV Test that is available OTC called?
OraQuick - provides immediate results (other OTC test kits require that a sample be sent to a lab). The upper and lower gums are swabbed with a test stick, put into a test tube containing liquid. After 20 minutes, test stick can be read.
Negative of OraQuick: tests should be used at least 3 months from exposure due to the lag in antibody production. testing sooner can cause a false negative result.
What is the major indicator of immune function and used to determine the need for OI prophylaxis?
CD4 count
What is the most important indicator of response to ART?
HIV viral load (how much HIV RNA is in the blood). High viral load can be due to medication non-adherence or drug resistance. The treatment goal is an undetectable HIV viral load.
What needs to be monitored or tested for when considering use of abacavir (Ziagen)?
HLA-B*5701 allele
What needs to be monitored or done if considering using maraviroc (Selzentry)?
tropism assay
What are the one-pill, once daily (single tablet regimens) recommended for patients who are treatment-naive adults? (3 options)
- Biktarvy (Bictegravir/emtricitabine/tenofovir alafenamide)
- Triumeq (Dolutegravir/abacavir/lamivudine)
- Dovato (dolutegravir/lamivudine)
What are the Two-pills (once daily for most) options for treatment-naive adults? (4 options)
- Tivicay + truvada
(dolutegravir + emtricitabine/tenofovir disoproxil fumarate) - Tivicay + Descovy
(dolutegravir + emtricitabine/tenofovir alafenamide) - Isentress + Truvada
(raltegravir + emtricitabine/tenofovir disoproxil fumarate) - Isentress + Descovy
(raltegravir + emtricitabine/tenofovir alafenamide)
(Isentress if twice daily; Isentress HD is 2 pills once daily)
What do most preferred regimens for treatment-naive adults contain?
Most preferred regimens contain 2 NRTIs and 1 INSTI (“teg”)
-Truvada (emtricitabine/tenofovir disoproxil fumarate) OR Descovy (emtricitabine/tenofovir alafenamide) make up the NRTI backbone in most regimens.
Which NRTIs should not be used together since they are both cytosine analogs and are therefore antagonistic)?
Lamivudine and emtricitabine
When should one not use Dovato (1 NRTI and 1 INSTIs) in treatment naive patients? (clue: 3 reasons)
- When HIV RNA > 500,000 copies/mL
- Known hepatitis B virus (HBV) confection (or HBV status unknown)
OR - HIV genotypic testing not yet available
What should one do prior to starting Triumeq?
Test for the HLA-B*5701 allele before using. A positive result indicates a higher risk for a severe hypersensitivity reaction (HSR) and any abacavir-containing product is contraindicated.
When should Biktarvy, Triumeq, Dovato, Truvada, and Descovy not be used?
do not use if CrCl <30 mL/min
What is the alternative ART regimen that is PI-based (protease inhibitors, “navir’s”) (boosted with cobicistat or ritonavir)? (in addition to 2 NRTIs to serve as the “backbone”)
Darunavir (Prezista) or atazanavir (Reyataz)
What is the alternative ART regimen that is NNRTI based? (in addition to 2 NRTIs to serve as the “backbone”)
Efavirenz (Sustiva) or rilpivirine (Edurant)
What is the alternative ART regimen that is INSTI-based? (co-formulated in one pill)
Elvitegravir/cobicistat/TDF or TAF
I.e. Genvoya (elvitegravir/Cobicistat/TAF)
i.e. Stribild (elvitegravir/cobicistat/TDF/emtricitabine)
For the NRTI backbone for ALTERNATIVE ART regimens, what are the NRTI backbone options?
NRTI backbone (2 drugs, 1 from each row)
- TDF or TAF or abacavir PLUS
- emtricitabine or lamivudine
What is the brand name for abacavir and what class is it in?
Ziagen (NRTI)
What is the brand name for emtricitabine and what class is it in?
Emtriva (NRTI)
What is the brand name for lamivudine and what class is it in?
Epivir (NRTI)